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Sending a Seismic Trace to Surface After a Vertical Seismic Profiling While Drilling Measurement

a vertical seismic profiling and seismic trace technology, applied in the field of acquiring data in a seismicwhiledrilling operation, can solve the problems of long delay of methods, poor quality of subsurface images, and inability to accurately obtain images

Active Publication Date: 2010-12-16
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An obtained image often suffers in spatial accuracy, resolution and coherence due to the long travel paths between source, reflector, and receiver.
In particular, due to the two-way passage of seismic signals with a low, laterally varying velocity through a highly absorptive near-surface weathered layer, subsurface images are often of poor quality.
This method suffers from long delays while the BHA is lowered and raised and data is being collected.
However, the rate at which data is sent uphole using telemetry is limiting, especially when compared to the large amount of data that typically needs to be sent uphole.

Method used

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  • Sending a Seismic Trace to Surface After a Vertical Seismic Profiling While Drilling Measurement
  • Sending a Seismic Trace to Surface After a Vertical Seismic Profiling While Drilling Measurement
  • Sending a Seismic Trace to Surface After a Vertical Seismic Profiling While Drilling Measurement

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Embodiment Construction

[0017]FIG. 1 shows a schematic diagram of a drilling system 10 with a drillstring 20 carrying a drilling assembly 90 (also referred to as the bottom hole assembly, or “BHA”) conveyed in a “wellbore” or “borehole”26 for drilling the borehole. The drilling system 10 includes a conventional derrick 11 erected on a floor 12 which supports a rotary table 14 that is rotated by a prime mover such as an electric motor (not shown) at a desired rotational speed. The drillstring 20 includes a tubing such as a drill pipe 22 or a coiled-tubing extending downward from the surface into the borehole 26. The drillstring 20 is pushed into the borehole 26 when a drill pipe 22 is used as the tubing. For coiled-tubing applications, a tubing injector, such as an injector (not shown), however, is used to move the tubing from a source thereof, such as a reel (not shown), to the borehole 26. The drill bit 50 attached to the end of the drillstring breaks up the geological formations when it is rotated to dri...

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Abstract

A system, method and computer-readable medium for acquiring seismic data, which includes activating a seismic source at a surface location; defining a seismic trace of a seismic wave received at a downhole location on a bottomhole assembly in a borehole in response to the activation of the seismic source; compressing the seismic trace; and recording the compressed seismic trace to a storage medium.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]This application claims priority from U.S. Provisional Patent Application Ser. No. 61 / 185,875 filed on Jun. 10, 2009.BACKGROUND OF THE DISCLOSURE[0002]1. Field of the Disclosure[0003]The present disclosure relates to a method and apparatus for acquiring data in a seismic-while-drilling operation and in particular to transferring data from a downhole location to a surface location.[0004]2. Description of the Related Art[0005]Conventional reflection seismology uses sources and receivers at a surface location and images subsurface layers from reflected seismic energy caused by contrasts in subsurface impedance. An obtained image often suffers in spatial accuracy, resolution and coherence due to the long travel paths between source, reflector, and receiver. In particular, due to the two-way passage of seismic signals with a low, laterally varying velocity through a highly absorptive near-surface weathered layer, subsurface images are often o...

Claims

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Application Information

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IPC IPC(8): G01V1/48
CPCG01V1/42
Inventor COMAN, RADUNEUBERT, MICHAEL
Owner BAKER HUGHES INC
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